First, check out Bud's Gun Shop for a much better price ($649 delivered, I think).
Next, the Marlin Cowboy model in the same caliber costs the same, but is somewhat lighter and has a side loading gate. IMHO, this is the only real downside of the Henry - no side loading gate.
Other than that, you get a brass framed rifle (like they used to make them) with an octagon barrel that performs as well as any other lever gun in the class. I don't think you'd regret buying one (a lot of guys seem to like the extra weight, too). I've seen several at my favorite shooting range, and everyone that has one absolutely loves it, even without the side loading gate.